woodshedding
n.— «Mr. Rollins, who has long been lionized, partly for his intense, solitary practicing—or woodshedding, in jazz argot—would often work in the cottage past nightfall.» —“Saxophone Colossus Strides Into a New Life” by Nate Chinen in Germantown, New York New York Times Oct. 21, 2006. (source: Double-Tongued Dictionary)